Question

statism full dilution of acid acid is added to water and not water into acid

Answer 1

Dilution of an acid is exothermic. The heat generated can vaporize the water and cause a splatter. ... Adding water to an acid is an exothermic reaction and a large amount of heat is liberated.So,acid must be added to water in drops inorder to dilute it..
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Answer 2

Explanation:

for dilution of acid acid is added into water not water into acid because if we add water into acid it forms an extremely concentrated solution of acid initially. So much heat is released that the solution may boil very violently splashing concentrated acid out of the container and all this because solution is exothermic.